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In this lesson we will talk about the explanation of some commonly used terms in the hard start standby part

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Let's first look at what it means to stand by

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Standby refers to the state when the computer is plugged in and the power button is not pressed.

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This state is generally the state that the computer is in after shutting down.

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Let's see what nouns it has

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First is VCCRTC

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VCCRTC is a power supply

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The button battery on the mainboard is used to generate VCCRTC power supply

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Shut down the computer or even unplug the power supply, and when it is turned on again later,

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we will find that the time is still accurate

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This is because of the existence of button batteries, that is, CMOS batteries.

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With a CMOS battery, the RTC circuit will work

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Then the time and some settings in the BIOS will not be lost

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RTCRST# and SRTCRST#

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Where RST refers to the reset

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These are the two reset signals

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Both resets are used to give the bridge

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These two resets are generally controlled by VCCRTC

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When there is VCCRTC, these two reset signals will also be high

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Next is the 32.768KHz clock

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This is a clock for the RTC circuit

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There will be a 32.768KHz crystal oscillator on the mainboard,

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which is called the crystal oscillator of the RTC circuit

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Under normal circumstances, as long as the bridge has the power supply of the RTC circuit,

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the crystal oscillator of the RTC circuit will work.

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VCCDSW_3P3 is the deep sleep standby voltage of the bridge, 3.3 volts

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Under normal circumstances, this voltage only needs to be plugged into the power supply.

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DSW_PWROK, this is the bridge's deep sleep standby voltage good signal, also 3.3 volts

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Generally, this signal is sent by IO to tell the bridge that the deep sleep standby voltage is normal.

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SLP_SUS#

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This is a deep sleep state indicator signal

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When the bridge gets VCCDSW_3P3 and DSW_PWROK, it will send a high level SLP_SUS#

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This signal is usually 3.3 volts

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There are two power supplies below, VCCPRIM_3P3 and VCCPRIM_1P0

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They are the two main standby power supplies of the bridge, 3.3 volts and 1.0 volts respectively

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During standby, these two power supplies also need to be normal.

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The last one is RSMRST#

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This is the main standby voltage signal of the bridge,

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which is used to tell the bridge that the main standby voltage of the bridge is normal

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These are some nouns for the standby part of the mainboard